Rotary engine.



K. 6,-. E. WITTIG.

RUTARY ENGINE. APPLIGATION FILED APRA, 1910.

Patented Feb. 21, 1911.

.the fixe voiving chambers, which 'are connected .with- ROTARY ENGINE.

Specification of Letters Patent.

Patented Feb. l, 1911.

Application filed April 4, 1910. Serial No. 553,239.

To all wimn if, may conc-mm:

lic ii.. known lhiil'/ we, 'KARL ivlrr'rio Iand EMU, Wi'rrio, the firsts. subject-ot the Grund Dulce oi Boden und ille second ai subject ot',the King et Snx'ony, both residents of Zell, in Vfie-f..i\tlial, in thefreind Duchy of linden, ihri'iminy, ien"` invented new and usefulimproveinens in .ilolcry ling-illes, oi'. which llic following is :ifnli and exact speeificzition.

l'hc invention rintes `l'o iniprejiveznenis in rotary engines, which mayhe utilized :is motor4 pumps., ventilators und compressors and which:ire of the l-:ind having n crescent shaped working chmnher divided into:1. cerlaiin mijnheer oi radiuily movable pistons oiirrieal hy e cui,drieal drum eccentricziliymounted in :1 cylindrical casing. In order tocounteract the centrifugal forces of the pistons in such engines andal.' the saine time reduce the friction to a minimum, it has alrem'lybeen yn'oposed to provide one or more. rerolnhle supporting; rings whichserve' to prevent the @nier ends of the pistons com ing into contactwith the stationary cylinder und thns relie np the centrifugal forces fthe pistons.

New, the present invention relates to iniprovelnents in rotary enginesand the like with ievohibie supporting rings of this kind, wherein euchof the supporting rings of an interno? diameter corresponding to, Unepprosimntely corresponding to the diameter of the cylinder here, islocated in a. groove "in the cylinder Woll with a certain amountl ofplay in pienes at right angle to theaxis of the engine shaft. But einem;he'pressure existent within the engine tends to displace the revolublesupporting rings radially Witl'i considerebleforce, each of thesupporting rings is, eccording to the present invention, provided withpartitions extendin in the direetion of the exis end fitted to-t eouter' giirfeces of the revoluhiesupportingringg the said 4iertitionsyieidingly cesing and forming thereby-lr@ the interior-ofthe enginelsind inwhich the pressure .iinid is. edrnitted, in order# tocounterbalsince the inner radial pressure," pressure and the theintensity of theiuid sii/,e of thesaid pressureeouuterbalancing chambersdetermining the de ree of the opuntelbalancingeect. In or' er, in a..ro' tary engine of 4this kind, toV 'maintain the r`el bearing' gemist lquired tightness at the end feces aga-inst which the revoluble partstorn, notwithstanding; the difierence-sY in'expansion of the revoluhleparts (pistons carrier :rnd pistons) and the fixed easing, un endrwullof the cas 60 ing is rinde movable relatively to the revelnhl parte. andsubjected to the action of :1 'pres ire device, in such c manner thatthe contacting surfaces of the seid revoluble pei-ls and of the seid endWall running on noch other, are pressed against each other und ihe, whenthe friction between the end w'ili and the revclnhle parts becomes too,weer he said end wall and revolnble part-s move together to o. slightextent and slacken thereby sonieiviiet the pressure device.' In order,furthermore, to produce the colnpenA sation effect already known inconnection with air pumps having reciprocating pistons (coinmunictionbetween both cylinder ends for a sh time at each dead point position ofthe piston), in e rotary engine of 'this kind, which is to be used as anair or gas pump, the engine is provided with connect-VV ing chenneiswhich serve as connectiowbetween the Working cells, which havejust'expolled their eontentsand those which haveA completed theirsuction action.

To enable our inventionV to be fully understood We wiil describe thesaineby reference to the accompanying drawings, in which :,f

Figure i viitistrates e section on the line fr, fr, of Fig. 2 of arotary engine constructed in accordance with our invention. F-ig.2 's

a vertical section of the same on the liney, y 90 of Fig. l. Fig. 3:mend view,.part1 in section on the line e, e of Fig. 1, and igs. 4, 5

and. 6 show inodiications of of .the

'en ine. y n the .construction shown in Figs. 1, 2

and 3, e piston 'carrier ordrum 1 -is-eccentrically 4mounted in theeyittiiegleasing 2.

The creseenbsha ed,

Illy a ,numberJ cnf-.pistons- 3' vided into cells which may be madeofthip hardened steel Two supporting rings -4 `whieh volve with the saidpistons 3,- endtnke up platee.

the centrifugal forces of' the. 4423,111@'proef ticaily 'Withoutfriction, .have "an inner (1ianeter, which is the same astht'o the cyl-1,05

inder chamber 2, and are inserted in grooves 5, sothat they can moveuitefreely' perf.

.pendicularly to thejlon itu 'themselves to the oter ren i-ugly :Contactwith the casing, thus previdinake sure of the pistons 3 contactingequally i wellfivith the supportiner rings and with the cyliiider lwall.

liy arranging the supporting` rings. in grooves in 'the cylinder wall`and giving thein radial play, as described, the ai'iniilar space hehindeach ring 4t may he used for tl i e piirpose et' counterhalancing theinner radial pre'ssure on the rings 4. Such a eoiinterhalancing,l etfectis attained hy fitting the exterior of the supporting, -rii 4. withpartitions 6 which. entendx thty direction ot' -the axis,. andyieldinte.;v limited revolving l,pressi re `count-einhal- -ancin'gchalutiers around .the rfigs 4. These .changibers are directly connectedwith the interiorV ot the engine by means of channelsl torinedby simplehoriiigs which convey the pressure. The partitions G are simplylinserted into grooves in the rings 4 ani-t arepressed close against .thehousing by the centrifugal force which renders springs and the .likeunnecessary for this purpose. The partition-s (3 and channels 7, whichrei-'olve-with therings 4, act on the oil like centrifugal pumps andcontinually lpress the sai behind-the rings 4C so that these always rinneoil. Although it may appear to be hest to conn neet each pressurechamber with the point heinterior'ot' the machine situa-ted dily.rj 1dially opposite to its middle part this. is vnotlalways so, since thereare forces iiiaildition to the radial pressure acting on theri-ngs-; Forexample, when the engine l s used an tir puinp,` there is considerableriction between the pistons and their guides on that side of the engineon which compression, tak'es pla-ce7 andas a result the pistons pressmore strongly outward on to the rings ll on this side Ithan on the otherside, and consequently an increased coiinterhalancin'g action oftherings 4 trom tlie'inner pressure. is required on theeompression side.This increased., counterhalancing actionv may be effected 'by connectingthe pressure counterloaljanciiiggr chambers with points of the interiorof the engine which arein advance relatively to the direction ofrotation, since the internal pressure increases on the coinpressionside. in the direction of rotation. This particular construction isillustrated at theup-per part ot Fig. Q .where it will he seen that thepart 7 rims ohliquely through the supporting rind. In rotary inotirei'iower engines (motors on the. other hand. the liitions are reversed),a weakened coiii'iterhalencino' action lening1 necessary, which attainedhy forward displaceine. t; lof the channel 7 in the direction in whichthe volume of the cells increases.

will he understood that the channels 7- nnihhe fitted in the fixedinstead of the rc* dit ving parti To insure thi` automatic tightness :itthc cnd walls of the cylinderA :is descrihcd ahorc. the lett cud pleitet) o|` the casingY 2 is moi- 2 :.lil)r and rcvoluhly arranged aiidcari-ics a.

screw-ihremlcd hose-S which en eag'cs a [ined 'female screw l() in thecasiu` 2. Si is suhicctcd to a tur ing n'ionient. (rota ticn moment) ina diiccliioi'i contrary to that'. of the rotation oiI thc en .frine`either hy nieaiis ot `aweight 1l suspended i'roni the Iii-ss Ivor'li):other suitahlc means. Il`hc cut ot thc sci'e\i'-thread on the hoss S somade that in consequence. ot' the turning moment the disk t) is inoiedtoward the pistcii carrii-r l until it. touches the saine.. lt now thefriction inonicnt het wecn the piston drinn l' -and dist: 1) isJeri-cater than the turning inoinentgcxerciscd h ij the weight 11, thedisk t) will he carried along' slightly hy the piston drinn 1, and willthen move away owing to its `'uidancc h v a screw thread until the.friction moment and the turning,F moment' are equal. ln other words theamount oll the friction moment can he regulated hy regulating1 theamount ot the turningnio.- inent.

To etl'ect the pressure compensation pre i iousjly referred to`, achannel 12 situated :it

a convenient point, as nea :is possihlc to the cell having' the smallestiolunie, hetwcen the suction and expulsion ports. extends into theinterior ot the cylinder. One end of a Apipe 1? is att-ached 'to thesaid channel '12 and the other end to a.' channel 1=l which also leadsinto the interior oi' the cylinder at. a., point behind the suctionport. in the dircction of rotation. lin this manner. connection isestablished het-weon the cells 15 vwhich have justexpelled theircontents and contain air at the expulsion' pressure and cells 16,wherein there exists a pressure which is only slightly' greater than thesuction pressure'. ln other Words, a tlow of air troni the cells l5 intothe cells 'l'will take place, wherever there is a difference in'pressure between the two cells. The pipe 13, for which may hesulistituted a connection channel in the cylinder wall, is convenientlypro- A`vided with a cock i. to' enable the pressure compensation to heregulated as desired. uunihcr o'f such conduits 12, 13 and 14; may hepriividi-d so that each cell 15 :i t'ter having lci't the expulsionchannel will first he connected with a. ecll 1.(3 in whichl a n'ioderateconiiiressioi'i has :ilrcai'ly taken place, and so that cn furtherirotatioli the said cell 15 The disk will .he connected with a cell A1hwhich is 'said drum and`movuble radially thereof,

porting rings when the drum is rotated, the Wall thereof, a drumeceentrically mounted supporting 'rings revolving With the pistons insaid cylinder, a plurality of pistons upon alnd ctounteructing thecentrifugal force i t iereo In witness whereof vWe have hereunto signedour naines this *24th day of March 1910, in the presence of twosubscribing wit- 20 ing circumferential grooves in the interiorsupporting rings of approximately the saine internal diameter as thecylinder-bore, located in said grooves in the cylinder' and having playperpendciilur to the longitudinesses.

nal axisof the cylinder, and means conneet- KARL WITTIG. ing saidpistons to said rings, whereby the l EMIL WITTIG. outer ends of therzidial pistons ma beur t Witnesses:

tightly but GEO. GIFFORD,

With dierent degrees o presl y AMAND Rri'rnn.

snre against both the cylinderland the sup-

